Comparison of the performance of the modified SERS vs. different methods of detection of IAA.

Entry	Method	Matrix	Detection limit/μM	Analytical timeb	Ref.
1	HPLC (CMMIPs)	Plant tissues	0.025	>12 h	26
2	Differential pulse voltammetry (MWCNT-CS/GCE)	Pea root extracts	0.1	>12 h	27
3	Square wave voltammetry (BDD)	Vegetable samples	1.22	>12 h	28
4	Ampromerty (hemin/rGO/GCE)	Tomato samples	0.074	—a	29
5	Ampromerty (AuNP-GH/GCE)	Phosphate buffer solution	0.21	—a	30
6	Ampromerty (MWCNTs-DHP-GCE)	Plant leaves	0.02	>12 h	31
7	Electrochemical method (PST–rGO)	Plant leaves	0.05	>12 h	32
8	Electrochemical method (carbon tape-modified electrode)	Whole pea seedlings	0.1	<5 min	33
9	Chemiluminescence (trivalent silver)	Human urine, mung bean sprouts and soil samples	4 × 10−7	—a	34
10	Photoelectrochemical immunoassay	Plant seeds	2.59 × 10−7	—a	35
11	Capillary electrophoresis	Banana, cabbage and cucumber extracts	3.48 × 10−6	—a	36
12	Colorimetry	No real sample	7.8 × 10−2	—a	37
13	Fluorometry	Fruit juice	6.23 × 10−5	—a	38
10	SERS coupled with Au nanoparticles substrate	Human serum and urine	0.05	<5 min	Our study

^aThe analytical time was not reported.

^bTotal analytical time included both sample preparation and detection.